One new dihydrobenzofuran lignan from Vitex trifolia

Abstract

A new benzofuran-type lignan, vitrifol A (1), was isolated from the fruits of Vitex trifolia, along with three known compounds 2–4. Their structures were elucidated mainly on the basis of 1D, 2D NMR and MS spectral data. Compound 1 was first isolated as a dimer of dihydrobenzofuran-type lignan.

Keywords:

• Vitex trifolia
• Verbenaceae
• vitrifol A
• dimer of dihydrobenzofuran

Acknowledgements

This study was financially supported by the Training Program of Qualified Person, the Department of Science and Technology, Yunnan Province (2005–2007) to Professor Ji-Jun Chen. The authors thank the members of the Analytical group of Kunming Institute of Botany for the measurements of UV, IR, MS and NMR spectral data. We are also grateful to Mr Jing-Yun Cui for collecting and identifying the plant materials.